package com.itheima.canal.listener;

import com.alibaba.otter.canal.protocol.CanalEntry;
import com.itheima.canal.config.RabbitMQConfig;
import com.xpand.starter.canal.annotation.CanalEventListener;
import com.xpand.starter.canal.annotation.ListenPoint;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.zip.CheckedOutputStream;

@CanalEventListener //声明当前类是canal的监听类
public class Bl {
    @Autowired
    private RabbitTemplate rabbitTemplate;

    /**
     * @param entryType 当前操作数据库的类型
     * @param rowData 当前操作数据库的数据
     */
    @ListenPoint(schema = "changgou_business",table ={"tb_ad"})
    public void add(CanalEntry.EntryType entryType,CanalEntry.RowData rowData){
        System.out.println("广告数据表发生改变");
        //获取改变之前的数据
        //rowData.getBeforeColumnsList().forEach((c)-> System.out.println("改变前的数据" + c.getName() + "::" +c.getValue() ));

        //获取改变后的数据
        //rowData.getAfterColumnsList().forEach((c)-> System.out.println("改变后的数据" + c.getName() + "::" + c.getValue()));

        System.out.println("_________________________________________");


        //发送消息
        //修改数据前
        for (CanalEntry.Column column : rowData.getBeforeColumnsList()) {
            if("position".equals(column.getName())){
                System.out.println("发送消息到mq  ad_update_queue:"+column.getValue());
                rabbitTemplate.convertAndSend("","ad_update_queue", column.getValue());
            }
        }

        //发送消息后
        for (CanalEntry.Column column : rowData.getAfterColumnsList()) {
            if("position".equals(column.getName())){
                System.out.println("发送消息到mq ad_update_queue: "+ column.getValue());
                rabbitTemplate.convertAndSend("","ad_update_queue",column.getValue());
            }
        }
    }
}
